2049991 has 2 divisors, whose sum is σ = 2049992. Its totient is φ = 2049990.

The previous prime is 2049977. The next prime is 2050007. The reversal of 2049991 is 1999402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2049991 - 2⁷ = 2049863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2049941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1024995 + 1024996.

It is an arithmetic number, because the mean of its divisors is an integer number (1024996).

2^2049991 is an apocalyptic number.

2049991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2049991 is an equidigital number, since it uses as much as digits as its factorization.

2049991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 2049991 is about 1431.7789633879. The cubic root of 2049991 is about 127.0332233744.

The spelling of 2049991 in words is "two million, forty-nine thousand, nine hundred ninety-one".